A cobpobatioiir of



Sept' 6 1932.

BEAD CLOSING MECHANISM FOR TIRE WRAPPING MACHINES I 2 Sheets-Sheet lFiled Aug. 18 1927 INVENTOR.

ORNEY.

R. P. HARVEY Sept. 6, 1932.

Filed Aug. 1,8. 1927 2 Sheets-Shea? 2 INVENTOR.

Patented Sept. 6, 1932k ROBERT. 12.. HnRvEE, for' SPRINGFIELD,MASSACHUSETTS; ASSIGNO'E 'ror THE; msx

L MASSACHUSETTS.'

R/UBBER COMPANY, 0F CHIGOPEE FALLS; MASSACHUSETTS, A CORPORATION'OFEEADcLosING .MECHANISM Fon TIRE WEAPPING- MAcIIINEs avhelical wrapping'of paper. To insure tightness-inthe' wrap, toavoid as far as possiblei3 undue strains on the paper when wrapping nomor'e pressure than'necessary to,l keep the' beads closed, and actingby holding the beadsChine."

` Referring to the' drawings,

Fig. 1 is aside elevation ofa tire wrapping machine embodying myinvention; features unrelatedE to' the bead closin'g'devices beingomittedfor clarity in illustration; g

Fi '52;i's a detail corresponding to a portion ofFig.V '1' but showing amodification,"

tneend of tlrepaper'strip 'in starting the mathej'meehanism shown in lFig. 4

Fig; isa view corresponding 'generally to Fig. 4', butsliowing'thepartsgin bead c los-` im shown inl Fig. 6.'-

ATheinvention has been shown as appliedftoattirewrappingmachine of a yc:enventional type,in=which`the1tire 1U 'is mounted so as to rotatethrough and in a plane at rightang'les to alfslfulttle'l 11L- Theshuttle ismountedfor rotation in a carrier 12, here shown as pivotedat"1`3 to a' pedest'a1'14 arising 'from the main frame 15. Drivingmechanism for rotating theftirerandthe'shuttle hasy not been'illustrated'las it Smay be lof any conventionaltype Pneumatic vehicletires are customarily" prepa-redtfor sale 'by- :enclosing them withininto the lpositioninto which they are' forced by' theop'erator when hecloses them about:

'Figi l5 is a sideelevation'of thaty part of Epfnction 'fuenf Angustiai927; serieu no.' A21.3;85'0;

and is'not necessary'for an understanding`oflr my invention. i

v'The beadfclosing vmechanisn'i" is'V carried upon a pedestal 1 6, atthe top of whicha're mounted oppositely extending rods 17 upon 55':which slide carriers 18. Eachcfarrier supe; ports a roll'v 19,positioned to contact with the tire to hold thebeads closed. Eachclair#v rier` is also-provided with -a pivot pin 20" ..1

` extending through a slot21 in one ofa pair of mi arms 22- pivoted at23 to the pede`s'tal116, thea-rms being urged towards each other by! aspring 24. InterfittingI extensions 25and1 26 on the Aarms are tte'dwith'a' s't'ud 2"( vand n a slot-28 respectively, sothat the arms arealways constrained for equal pivotal nieves'y ment in oppositedirections.-v v

To one of the a'rms 22is securedfafprojection 29 bearing a stud 30running ffre'ely in' a.v ,A slotf31 formed vin a link-32 Y The'lowerendof thislinkispivoted to acrank`33 fixed upon the same shaft 34 as v'a-treajdle 35. A

' spring 36, of more -forcethan the'spring`24,

normally keeps-the parts inthev position 'of' Fig. 1Ll Whenthe-v'treadleis depressed the arms' 24 are permitted -to approacheach-other under the pullof spring 24 untiltherolls' v19 contact-withthe sides ofthe tire. FurtherV depression v of the treadle is withoutee'ct upon the arms on account of the lost motion I' connectionprovidedby slot- 31. The treadle 35may conveniently be used through `anysuitabley clutch' connection for 'starting the machine, since theapplication of the' bead closerscoincides withthe starting of thewrapping operation. Mechanism for this purpose has', however, not beenillustrateda's' ithas no direct bearing' upon thev description of myinvention. Aratchet 37 isse'cure'd asby as'crew' 38 9G to. each of thecarriers`18.- Tobrackets-39 at each side of the pedestall are pivoted'alt 40l pawls 41 which, when in engagement with ratchets 37, preventoutwardmovement' of E the carriers. The pawls are constantly urgedtowards thfe /ratchetsby springs 42,- eachI stretched between a pin 43fonthe pawl anda pin `44qon the pedestal. Atcertain times, however, thepawls are held'ou't of contact width-thel ratchet's bye. bar 45,provided with 100 position with the lower side of bar 45, and is iconveniently gui-ded by a bearing 52 having a cap piece 53. Y, Y

In starting the wrapping of a tire upon the conventional form of machinethe operator takes the end of the paper strip, the body Of whichirsmounted upon a spool on the shuttle 11, tucks it between the tire beads,and

` starts the machine, meanwhile pinching the beadsl together upon thepaper strip to hold it in place. I utilize this operation for theactuation of the bead closing devices. With the tire'placed in themachine as in Fig. 1 the operator tucks the paper strip between thebeads and with his hand presses the beads tightly together at thispoint. I-Ie then depresses treadle 35 to release the bead closingvmechanism, and concurrently starts the machine, preferably by the sametreadle. As the treadle descends the rolls 19 are allowed to close inupon the sides of the tire, which have been pressed together asdescribed to close the beads. VAfter this contact has been made, furtherdepression of the treadle produces no eect lupon the position of th`ebead closers, which rest against the tire with thedight` pressurev ofspring 24. As the treadle reaches its lower limit the extension 50-raisesthe bar 45 andreleases the pawls, which-are then carried yby theirsprings into Contact with the ratchets 37 and prevent any outwardmovement of the bead closers. These having yonce been placed in theposition necessary to hold the beads closed, remain in this positionduring the completion, ofthe wrapping operation, and progressively closethe tire beads as the tire rotates.

When theltreadle is released upon the completion of the wrapping cyclethe extension 50 withdraws fromcontact with the bar 45, and the springs48 attached to the latter pull it down against the lesser force ofsprings 42.l rIhe bar strikes upon pins 51 and swings the pawls outofengagement with the ratchets. The rolls 19, however, remain inengagement with the tire until the parts are returned to the inactiveposition of Fig. 1 by the contact of pin 30 with the end of slot 31.

In the modification shown in Fig. 2 the linkage connecting the beadclosers to the starting treadle has been omitted, and the bead closersactuated solely by the tire. THe b eadclosers 19 and their mounting oncarrlers 18 remain the same as before, but instead of thespring 24operating upon the arms 22 a pair of springs 60 are employed,

stretched between pins 61 on the pedestal 16 and pins 62 on thecarriers. A roller 63 is mounted for rotation in a yoke 64 carried by arod 65 movable vertically in a bearing 66. A spring 67 constantlyurgesthe roller 63 upwardly. ,The lower end of rodris secured by a nut 68 toa bar 69 extending sidewise into a position to engage the pawls 41 l andshift them'out of theposition'of FigL-l Vand hold the rolls 19 againstseparation. In

order to permit introduction of the, tire into` the machine to open thebead closingmembers, horns 70.are liXed to the pivot pins 71 of rolls 19nuts 72. V Y 1 Considering the operation of this modified form ofmechanism, it should be noted that the rolls 19 are pressed togethervbyv springs 60 when the machine is inactive, in-l stead of being heldapart by thefaction of treadle operated linkage as in the formSpreviously described. The roll 63 is inits uppermost position, and theratchets 37 there. :tore free from the pawls 41. The curved surfaces ofthe horns 70 permit the easy introduction of aftire; the horns 7,0,andthev rollers 19 to which they are attached, moving gradually apartasthe tireis forcedl into place. The pressure ofsprings 60 is preferablynot great enough to close the beads, asv this would cause somedifficulty in Vinserting and removing tires particularly of the largersizes. The rollers 19 do, however, remain in light contact with the tiresides as thetire is inserted in the machine. When the tire reaches itsfina-l position it depressesroll' 163 and bythe consequent lowering ofbar (S19-.re-` leases the pawls for contact withthe ratchets. If theoperator now manually closes the' beads, or if these are temporarilyclosed by any other means, the springs 60 will cause the rolls 19 toVfollow the pawls clicking over the ratchets during this movement.v4 Thepawl and ratchet mechanism, while not interfering with the movementofthe rolls 19' inwardly, does hold the rolls in bead closing positionduring the subsequent wrapping operation. When the tire is removedtheroll 63 is released, and the pawls are freed from the ratchets so thatthe tire may easily force the rolls 19 further apart if necessary duringits removal.A 1

Having thus described my invention, I claim: y

1. In a tire wrapping machine, bead closing mechanism comprising a pairof tire engaging members y spring-pressed together, ratchet means forholding the members its against outward movement from a positiondetermined by their contact with the sides of the tire, means 'forseparating the members to remove them from contact with the tire, andconnections between said separating means and the ratchet means fordisengaging the latter.

2. ln a tire wrapping machine, bead closing mechanism comprising a pairof tire engaging members, a spring for forcing the members lightlyagainst the sides of the tire, means having a lost motion connectionwith the members for drawing them away from the tire, pawl and ratchetmechanism holding the members against movement away from the tire, andmechanism operative between said means and the pawl and ratchetmechanism 'for rendering the latter inoperative during the action ofsaid means.

3. in a tire wrapping machine, opposed tire engaging members, normallyyielding means acting to hold said members adjacent each other butpermitting their separation by the insertion of a tire between themwithout distortion of the tire, and a pawl and ratchet mechanismactuated by the complete insertion of the tire between the members forpreventing outward movement of the members while leaving the latter`free to Jiollow the engaged portions of the tire inwardly when the tirebeads are moved together by eXtraneous means.

ROBERT P. HARVEY.

